Coil-forming machine.



-A. L. MoHUGH.

COIL FORMING MACHINE.

APPLICATION mum MAR. 27, 1907.

1,016,700. Patented Feb. 6, 1912.

2 SHEETS-SHEET l.

II M A. L. McHUGH.

vCOIL FORMING MAGHINE. APPLIOATIOK IILEflMAR. 27, 1907.

Patented Feb. 6, 1912.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

ANTHONY L. MoI-IUGH, OF CINCINNATI, OHIO, ASSIGNOR, TO ALLIS-CI-IALMERS CO1VI IPANY, A CORPORATION OF NEW JERSEY, AND THE BULLOCK ELECTRIC MANUFAQ TUBING COMPANY, A CORPORATION OF OHIO.

COIL-FORMING MACHINE.

Specification of Letters Patent.

Application filed March 27, 1907.

Patented Feb. 6, 1912. Serial No. 364,842.

To all whom it may concern Be it known that I, ANTHONY L. Mo- HUGH, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Coil- Forming Machines, of which the following is a full, clear, and exact specification.

My invention relates to coil-forming ma chines and particularly to machines for bending metallic strip edgewise.

In the machines now used for bending -metallic strip edgewise in which in the bending operation the guide for preventing buckling of the strip is pivoted to the bending block about which the strip is being bent, said guide must be moved bodily away from said bending block periodically in order to allow removal of the part of the coil which has just been formed and insertion of the portion of the strip next to be bent. This has generally been done by entirely removing the anti-buckling guide, a proceeding both laborious and time-consuming.

It is the object of my present invention to provide an arrangement whereby the strip may be inserted or removed without the necessity of moving the anti-buckling guide away from the bending block.

With this object in view my invention comprises the combination, in a machine for bending metallic strip edgewise, of a bending block, and an anti-buckling guide movable relatively to said bending block about one axis to bend the strip about the block, and independently movable about another axis to allow insertion and removal of the strip.

Other features of my invention will appear from the description and drawings and will be particularly pointed out in the claims.

Figure 1 is a plan view of a coil-forming machine embodying my invention; Fig. 2 is a front elevation of the machine shown in Fig. 1; Fig. 3 is a section on the line 33 of Fig. 1; Fig. 4 is a section of the anti buckling guide on the line 44 of Fig. 1. Fig. 5 is an isometric view of the antibuckling guide shown in Fig. 1; Fig. 6 is an isometric view of another form of coil-forming machine embodying my invention; Fig. 7 is an isometric view of the anti-buckling guide used in Fig. 6; and Fig. 8 is an enlarged plan view of the bending block and anti-buckling guide of Fig. 6, together with a portion of the metallic strip.

In the arrangement shown in Fig. 1, standards 10 and 11 are adjustably mounted 011 a base 12 so that the distance between them may be varied. Bending blocks 13 and 14 are removably attached to the standards 10 and 11 respectively. The bending block 13 has a single semi-cylindrical bending surface a, while the bending block 14 has two concentric semi-cylindrical bending surfaces Z) and c of different radii. Arms 15 and 16 mounted on the standards 10 and 11 can swing about the axes of the bending surfaces a and b respectively. Rollers 17 and 18 are mounted in the arms 15 and 16 respectively, the roller 17 having a single groove, while the roller 18 has two grooves d and e. The outer edges of the flanges of the roller 17 touch or nearly touch the bending surface a, rolling on said surface as the arm 15 is turned on its pivot, while the outer edges of the flanges of the grooves (Z and c touch or nearly touch the bending surfaces 5 and 0 respectively, the roller 18 rolling on said surfaces as the arm 16 is turned on its pivot. The rollers 17 and 18 are fixed on pins 19 and 20 respectively so that said rollers can be turned about their axes to bring cutaway portions f and g of their respective. flanges adjacent to the bending blocks 18 and 14 to allow removal or insertion of the metallic strip 21 to be bent. The lower flanges of the rollers are left intact.

The grooved rollers 17 and 18 form guides for preventing buckling of the strip as it is being bent. Grooved members 23 and 24 prevent the strip from bulging away from the bending blocks 13 and 14 as the strip is being bent, these members being provided with slots through which pins 25 and 26 screwed into the supports 10 and 11 extend. The members 23 and 24 may be firmly fastened in place by thumb screws 27 and 28 respectively. Anadjustable bar 29 is provided for properly locating the end of the strip 21 for the first turn, while the strip is held from. slipping by a clamp 80.

With the arms 15 and 16 swung counterclockwise as far as possible, the end of the strip 21 is placed abutting the rod 29 as shown in dotted lines and is clamped in pothat the cut-away part 9 is adjacent to the bending block. The strip 21 is now laid against the lower intact flange of the groove 6, and the member 24 moved in and fastened so that the strip 21 is in its lower groove. By now turning the pin 20, the roller 18 is turned to bring the strip entirely into the groove 6, and then, by swinging the arm 16 in a clockwise direction, the strip 21 is bent around the surfacec, in this operation remaining continuously in the groove 6 of the roller 18.

With the cutaway part of the upper flange of the roller 17 adjacent to the bending block 13, and the member 23 moved outwardly, the strip 21 is laid down against the lower intact flange of the roller 17, and the member 23 moved inwardly tobring the flanges of its groove on each side of the strip. The clamp isnow released and the part of the strip which passes through said clamp is bent upwardly out of the way, as shown in full lines in Fig. 2. After first turning the roller 17 tobring the uncutaway portions of its upper flange adjacent to the bending block 13, the arm 15 is swung in a clockwise direction to bend the strip about the bending surface a. In this operation, the strip remains continuously in the groove of the roller 17. The member 24 is now moved outwardly and the arm 16 swung back counter-clockwise to its limit, and the cutaway portion 9 of the flange of the roller 18 again brought adjacent to the bending block 14. The strip 21 is now put in place for the upper groove of the member 24 and the groove d of the roller 18, and 7 said memberand roller properly moved to hold the strip in this position. By again moving the arm 16 in a clockwise direction the strip is bent around the surface 6, finishing the coil. By sliding the members 23 and 24 outward and turning the rollers 17 and 18 so that the cut-away portions of their flanges are adjacent to the bending blocks 13 and 14, the finished coil may be removed and another coil formed in the manner indicated above. t I

As here shown, the coil formed of the strip 21-is very simple, having but one turn at one end and two turns at the other. By providing the proper number of bending surfaces at, b and. 0 and the proper number of flanges in the rollers 17 and 18, any desired number of turns'of the coil may be used. Thedif'ferent bends of these turns may be either the same size, as those formed around the surfaces (1 andc, or of different sizes,'as those formed around the surfaces 1) and 0; i r

In the modifications shown in Figs. 6, 7

V r and 8 the bending blocks 41, 42, 43 and 44 q '65 are attached to a table 45 at the center of which is a hole 46 in which fits a shaft, on which the table can turn in the direction of the arrow. Each of the bending blocks 41,

42, 43 and 44 has a bending surface in the form of a quarter of a cylinder, the other corners of these blocks being of any desired shape. Links 47 are pivoted to turn about the axis of these cylinders while anti-buckling guides 48 are fixed on pins 49 in the outer ends of said respective links. An operating arm 50 is attached to each pin 49 to turn said pin and its associated guide 48 about the axis of said pin between limits set by stops 51 and 52 on the link 47. Each of the guides 48 is provided with a groove Z in its edges m and n, the lower flange of the groove on the edge a being cut away as best shown in Fig. 7. The two edges m and n of the upper flange of the groove Z are joined by a surface formed on a cylinder the axis of which is the axis of the pin 49.

The strip 53 to be bent is supplied from any desired source and is fed under one 011,, the anti-buckling guides 48. By swinging this guide as far as possible clockwise, the cutaway portion of the lower flange of its groove Z is brought adjacent to its associated bending block, say 41, to allow the strip 53 to move upwardly into said groove. By now swinging the arm 50 counter-clockwise until it strikes the stop 51, the anti-buckling guide 48 is so moved that the uncutaway portion of the lower flange of the groove Z is brought underneath the strip 53. By holding the arm 50 in this position, that is, against the stop 51, and causing the table 45 to rotate in the direction of the arrow, the strip 53 is bent about the surface 70 of the bending block. This same operation may be repeated for the other bending blocks as they come around, each of the guides 28 being turned by its operating handle 50 to bring the cut away portion of the lower flange of its groove Z adjacent to the bending block to allow the finished corner of the coil to drop down upon the table 45 and a new portion of the strip 53 to be inserted for bendmg. I

Many modifications may be made in the precise arrangements here shown and described, and all such which do not involve a departure from the spirit and scope of my invention I aim to cover in the following claims.

What I claim as new is 1. In a machine for forming edgewise wound coils of metallic strip, the combination of a rotatable frame, aplurality of bending blocks carried by said frame, and a grooved anti-buckling guide carried by each bending block, each guide having a limited movement relative to said bending block and an independent movement about an axis within itself.

2. In a machine for forming edgewise wound coils of metallic strip, the combination of a rotatable table, a plurality of bending blocks carried by said table and having bending surfaces the elements of which are straight lines parallel to the axis of rotation of the table, and an anti-buckling guide carried by each bending block, said guide being grooved to receive the metallic strip, being movable at right angles to the elements of the bending surfaces of the bending blocks to produce bending of the strip, and being independently movable about an axis within itself to allow insertion and removal of the strip.

3. In a machine for forming edgewise wound coils of metallic strip, the combination of a rotatable table, a plurality of bending blocks carried by said table, said bending blocks having substantially cylindrical bending surfaces, and an anti-buckling guide associated with each bending block and movable about the axis of the bending surface of said block to produce bending of the strip,

--said guides being rectangularly grooved to prevent buckling of the strip and each having a portion of one flange of its groove cutaway and being movable about an axis within itself to bring the cut-away portion of its flange in suitable position to allow insertion and re moval of the strip. Y

4. In a machine for forming edgewise wound coils of metallic strip, the combination of a rotatable table, a plurality of bending blocks mounted on said table, said bending blocks having cylindrical bending surfaces, and an anti-buckling guide associated with each bending block and grooved to fit the strip, a part of the flange of such groove being cut away, each of said guides being movable about the axis of the bending surface of the cooperating bending block to produce bending of the strip and movable in the same plane otherwise than about such axis to bring the cut-away portion of the flange into suitable position to allow insertion and removal of the strip.

5. In a machine for forming edgewise wound coils of metallic strip, the combination of a rotatable table, a plurality of bending blocks carried thereby, the bending surfaces of said bending blocks being parts of cylinders, and an anti-buckling bending guide associated with each bending block and grooved to fit the strip, each of said guides being movable about the axis of the bending surface of the cooperating bending block to produce bending of the strip and independently movable about another axis to allow insertion and removal of the strip.

6. In a machine for bending metallic strip edgewise, the combination of a plurality of bending blocks, and anti-buckling guides grooved to receive such strip edgewise and fitting closely to the bending blocks, said guides being movable relatively to said repartly cut away, said guides being movable about the respective bending blocks, and independently movable about axes Within themselves to bring the place where the flanges of their grooves is cut away adjacent to the bending blocks.

8. In a machine for forming edgewise wound coils of metallic strip, the combination of a frame, a plurality of bending blocks mounted thereon, the bending surfaces of said blocks being parts of cylinders, and an anti-buckling bending guide carried by and fitting closely to each bending block and grooved to fit the strip, each of said guides being movable about the axis of the bending surface of the cooperating block to produce bending of the strip and movable in the same plane otherwise than about such axis to allow insert-ion and removal of the strip.

9. In a machine for forming edgewise wound coils of metallic strip, the combination of a frame, a plurality of bending blocks mounted on the frame, the bending surfaces of said blocks being parts of cylinders, and an anti-buckling bending guide carried by and fitting closely to each bending block and grooved to fit the strip, said guides being respectively movable about the axes of the bending surfaces of their cooperating bending blocks to produce bending of the strip and otherwise movable to allow insertion and removal of the strip, and said guides with their respectively cooperating bending blocks being arranged to operate on the strip successively to produce a full turn of 360 after which one of the guides with its cooperating bending block operates to start a second turn.

10. In a machine for forming edgewise wound coils of metallic strip, the combination of a frame, a plurality of bending blocks mounted thereon, the bending surfaces of said blocks being parts of cylinders, and anti-buckling bending guides carried by and fitting closely to the respective bending blocks and arranged with their respectively cooperating bending blocks to operate on the strip successively through more than a complete succession, each of said 11. In a machine for forming edgewise wound coils of metallic strip, the combination of a frame, a plurality of bending blocks mounted thereon, the bending surfaces of said blocks being part-s of cylinders, and anti-buckling bending guides carried by and fitting closely to the respective bending blocks and arranged with their respectively cooperating bending blocks to operate on the strip successively through more than a complete succession, a complete succession producing a total bending of 360, each of said guides being movable about the axis ANTHONY L. McHUGH.

Witnesses:

GEO. B. SCHLEY, FRED J. KlNSEY.

Copies of this patent may'be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

